南京理工大学学报（自然科学版）2012，Vol.36Issue(1)：66-72,7.
不完备信息系统中的优势关系多粒度粗糙集
Dominance-based Multigranulation Rough Sets in Incomplete Information System
摘要
Abstract
To study the rough set approach from the multi-view in incomplete information system, the limitation of dominance-based rough set approach with independent distribution is analyzed. The single-granulation rough sets based on expanded and limited dominance relations are expanded. The optimistic and pessimistic multigranulation rough sets are proposed,respectively. The basic properties of the new proposed models are analyzed and the multigranulation lower and upper approximations based on two different dominance relations are compared. The research results show that we can obtain greater lower approximations and smaller upper approximations through the limited dominance relation than the expanded dominance relation under multigranulation environment.关键词
多粒度/粗糙集/扩展优势关系/限制优势关系Key words
multigranulation/ rough sets/ expanded dominance relation/ limited dominance relation分类
信息技术与安全科学引用本文复制引用
翟永健,张宏..不完备信息系统中的优势关系多粒度粗糙集[J].南京理工大学学报（自然科学版）,2012,36(1):66-72,7.基金项目
国家自然科学基金(60903027) （60903027）
